The ANGLE removal's manual configure.cmake changes are now replaced
by updating the conversion script's special cases instead.
Change-Id: I06317fe0202b25bd9f9524da14e1bb0ccbb30cc1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>